`/rai_whoami_documentation_service` does not return a response upon call

Describe the bug
The /rai_whoami_documentation_service does not return a response upon call. Additionally, if the call command is aborted before receiving a response, the service throws an exception:

Traceback (most recent call last):
File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
self.run()
File "/usr/lib/python3.10/threading.py", line 953, in run
self._target(*self._args, **self._kwargs)
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 294, in spin
self.spin_once()
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 806, in spin_once
self._spin_once_impl(timeout_sec)
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 803, in _spin_once_impl
future.result()
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/task.py", line 105, in result
raise self.exception()
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/task.py", line 254, in call
self._handler.send(None)
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 447, in handler
await call_coroutine(entity, arg)
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 401, in _execute_service
response = await await_or_execute(srv.callback, request, srv.srv_type.Response())
File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 107, in await_or_execute
return callback(*args)
File "/home/user/Work/Robotec/rai/src/rai_whoami/rai_whoami/agents/ros2/vector_store_retrieval_agent.py", line 74, in service_callback
response.scores = [result[1] for result in vdb_results]
File "/home/user/Work/Robotec/rai/install/rai_interfaces/local/lib/python3.10/dist-packages/rai_interfaces/srv/_vector_store_retrieval.py", line 325, in scores
assert
AssertionError: The 'scores' field must be a set or sequence and each value of type 'float' and each float in [-340282346600000016151267322115014000640.000000, 340282346600000016151267322115014000640.000000]

To Reproduce
Steps to reproduce the behavior:

1. Configure the robot's identity according to the Robot's identity within RAI tutorial
2. Run the RAI Whomai service: python src/rai_whoami/rai_whoami/scripts/ros2_vector_store_retrieval_service.py panda/
3. Call the service: ros2 service call /rai_whoami_documentation_service rai_interfaces/srv/VectorStoreRetrieval "query: 'maximum load'"
4. The service will not return a response. If the service call is aborted, an exception is thrown within the src/rai_whoami/rai_whoami/scripts/ros2_vector_store_retrieval_service.py service

Expected behavior
The /rai_whoami_documentation_service should return a response, an error or timeout. Additionally, the service should not crash when the service call is aborted.

Screenshots
None

Platform

• OS: Ubuntu 22.04
• ROS 2 Version: Humble

Version
commit 0e12297a468eab719b25228f5e273877605cbdfd

Additional context
None

Start with src/rai_whoami/rai_whoami/agents/ros2/vector_store_retrieval_agent.py around the service_callback response.scores assignment, then reproduce the call using the documented service command and ros2_vector_store_retrieval_service.py. Done means the service returns a response, error, or timeout for the query and does not crash when the call is aborted.